<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<table border="1">
    <tr><th>姓名</th><th>年龄</th><th>性别</th></tr>
    <tr><td rowspan="3">小明</td><td>12</td><td>男</td></tr>
    <tr><td>12</td><td>男</td></tr>
    <tr><td>12</td><td>男</td></tr>
    <tr><td colspan="2">小明</td><td>男</td></tr>
</table>

</body>
</html>